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Appendix G:
Atomlab 500 And 500Plus
Serial Communications Interface
The Atomlab 500 has the ability to be controlled and monitored, with limitations, via the DB-9
RS-232 serial port.
Connection Details:
Cable: RS-232 female/female null modem, for connection to a standard PC COM Port
Port Settings: 19.2 KBAUD, no parity, 1 stop
Command Format:
All commands are in ASCII format, terminated by a carriage return (0x0D), and no longer than
7 letters. If a parameter is given, the command must be separated from the parameter by at least
1 space and/or comma. If the command or parameter has a format error, or a numeric parameter is
out of range, an error message is sent out the serial port, terminated by a CR/LF. All data
transmitted as a result of a command is also in ASCII and terminated by a CR/LF.
Usage Notes:
Some of these commands that actively change settings and operation of the display can cause
corruption of an activity someone may be in progress of at the display console. These remote
commands must be used with great care and consideration of how the unit is being used. The
ISO command, for example, when used to change an isotope is fine on a detector not in use,
but if a QA test is in progress for a sealed source and the ISO command changes the isotope,
the displayed activity will be out of sync with the displayed isotope symbol name.
Command Descriptions:
There are commands to report status, and some control the unit. Following is a list with
descriptions in alphabetic order.
^C
(Hex: 0x03) sends the most current activity reading out the serial port. A
carriage return (0x0D) is not required. This is implemented for
backwards compatibility with the Atomlab 100/200 models. Please refer to
the DS command for details of the activity report format.
1 (Hex: 0x31) same as ^C above. A carriage return (0x0D) is not required.
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